High-fidelity robust qubit control by phase-modulated pulses
Marko Kuzmanović, Isak Björkman, John J. McCord, Shruti Dogra, G. S. Paraoanu
Abstract
We present a set of and pulses that realize paradigmatic operations such as the transfer of the ground state population into the excited state and arbitrary <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi>X</a:mi><a:mo>/</a:mo><a:mi>Y</a:mi></a:mrow></a:math> rotations on the Bloch sphere. These pulses are based on the phase modulation of the control field. We provide an experimental proof-of-concept of these operations by using a transmon qubit, demonstrating resilience against deviations in the drive amplitude of more than <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mo>≈</b:mo><b:mn>20</b:mn><b:mo>%</b:mo></b:mrow></b:math>, and/or detuning from the qubit transition frequency in the order of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mrow><c:mn>10</c:mn><c:mspace width="4pt"/><c:mi>MHz</c:mi></c:mrow></c:math>. This modulation scheme is straightforward to implement in practice and can be deployed to any other qubit-based experimental platform. Published by the American Physical Society 2024